“Think about how the show starts: She shows up on Monica’s doorstep and is like, ‘Well, I’ve fucked up my life, so now, I’m going to make it your problem.’ … Let’s not forget that at the start of the show, Monica and Rachel weren’t friends, and hadn’t been since high school — the whole reason Rachel went to her is because she was the only person she knew in New York who wasn’t invited to her wedding. … It’s established in the episode with Brad Pitt that Rachel was a vicious bully in high school. So, at the start of the show, we have an objectively terrible person. Does she really change as the show goes on? I don’t think so.
—She wants to break up with Ross but doesn’t have the decency to tear the Band-Aid off in one go, and instead leaves Ross to do the hard work. As far as I’m concerned, ‘Let’s take a break’ is code for ‘I want this to be over, but I don’t want to take responsibility for it,’ and I’ll fight anyone who says otherwise. Then, she throws a tantrum at him for ‘cheating’ on her.
—She flies all the way to London for the express purpose of dangling herself in front of Ross one more time just as he’s getting married, and manages to wreck his wedding and his relationship with Emily.
—When they both get married in Vegas, somehow it’s all Ross’s fault (Ross obviously shouldn’t have said he got the annulment when he didn’t, but putting all the blame for the debacle on him was unfair).
—When she came on to him and got pregnant, she lied to their whole friend group about it and tried to blame it on him. Even when he tried to take the high road and let it go, she insisted on pushing it.
The whole 10 years was her jerking Ross around and expecting him to come running whenever she called, and never taking any responsibility for their relationship problems.”
—u/Knowledgeable_Owl